🌟Former US president, Barack Obama, backed the campaign of Democratic presidential candidate Joe Biden in the state of Pennsylvania and asked for a vote for Biden with a megaphone in his hand. Obama filled the vacuum of Biden<br /><br /> Poll results showed Biden ahead, while former US president Barack Obama backed Biden's campaign. The former President of the United States filled the gap of Biden, who paused for his debate with Trump. Obama participated in Democrats' activities in Pennsylvania to support Joe Biden, who had been his assistant for 8 years.<br /> Obama, who asked for a vote for Biden through a megaphone, also held a meeting with black politicians and community leaders in Pennsylvania.<br /> On the other hand, Pennsylvania is one of the critical states in the US elections. Trump won in 2016 in the state of Pennsylvania, which has long been dominated by the Democratic Party. According to the surveys, Biden is ahead in these states.